Fixed for latest API

Fixed for latest gmusic API, now requires avconv for most uploads.
Slightly better error for file not found
Added sanity check for 1000 song limit.
Updated to support new gmusicapi v1.0.0 and above
Added warning about copy/paste new lines
Updated this to work with WebClient 2.0.0 - bit hacky though because
search and create_playlist have vanished.
Merge branch 'master' of git@github.com:bmjsmith/m3uGoogleMusicSync.git

Conflicts:
	playlists.py